Question

我正在尝试从MySQL数据库中获取doc，pdf，docx文件并将所有文档文件压缩在一起。我面临的问题是，我只能下载一个文件而无法将任何文件压缩为ZIP。请帮助我这方面。

<?php

if(isset($_GET['id']) && isset($_REQUEST['clickit'])) 
{

    $id = intval($_GET['id']);

    if($id <= 0){
        die('The ID is invalid!');
    }else{

        $username = "";
        $password = "";
        $servername = "";
        $dbname = "";

        $conn = new mysqli($servername, $username, $password,$dbname);


        if (!$conn){
                die("Connection failed: " . mysqli_connect_error());
        }

此处我已采取表格中的所有列＆t; tbl_uploads_1＆＃39;并将其传递给结果。

        $sql = "SELECT * FROM tbl_uploads_1 ";

        $result = $conn->query($sql);
        $files = array();

这里我从名为＆＃39; file_name＆＃39;的列中获取记录。来自数据库中的表格，其中存储的文件名类似于＆＃39; abc.doc＆＃39;。我不确定下面的代码是否是区分具有不同扩展名的文档的正确流程。

        while($row = $result->fetch_assoc()) {
            $filename = $row["file_name"];
            $ext1 = end((explode(".", $filename)));

            if($ext1 == pdf){
                $files[] = "$filename.pdf";
            } else if($ext1 == docx){
                $files[] = "$filename.docx";
            } else if($ext1 == doc){
                $files[] = "$filename.doc";
            }

        //if ( file_put_contents("$filename.pdf", $content) === FALSE ) {
            //echo "Could not write PDF File";
        //}
        }

这是代码的压缩部分。请查看此内容。

        $zipfilename = 'temp_' . time() . '.zip';

        $zip->open($zipfilename, ZipArchive::CREATE);
        foreach ($files as $file){ 
           $zip->addFile($file); 
        } 
        $zip->close();

在我们压缩之前，我应该为每个文件包含头文件方法吗？

        header('Content-Type: application/zip'); 
        header('Content-disposition: attachment; filename=filename.zip'); 
        header('Content-Length: ' . filesize($zipfilename)); 
        readfile($zipfilename);  


    }
//else{
    //echo "Err!!";
//} 

$conn->close();

}

exit();
?>

Answer 1

尝试使用此代码从数据库下载文件

$sql = "SELECT * FROM table_name";
if ($result=mysqli_query($conn,$sql))
{    
    // $rowcount=mysqli_num_rows($result);
    // printf("Result set has %d rows.\n",$rowcount);
    //define array for storing files
    $file = array(); 
    while ($row = mysqli_fetch_assoc($result)) {   
        //give file name with extension    
        $name = $_SERVER['DOCUMENT_ROOT']."/demo/mysql_blob/files/".$row['file_name'];
        //store file name in array
        $file[] = $name;
        // store file in one folder named 'files'
        file_put_contents($name,$row["fileData"]);

    }
    $zipname = 'file.zip';
    $zip = new ZipArchive;

    //open zip file and put all files in zip
    foreach ($file as $f) {
        if($zip->open($zipname, ZipArchive::CREATE) === TRUE) {
            $new_filename = substr($f,strrpos($f,'/') + 1);
            $zip->addFile($f,$new_filename);
            echo "ok";
        } else {
            echo "fail";
        }
    }
    if ($zip->close() === false) {
       exit("Error creating ZIP file");
    }
    //check zip file create or not and download it
    if (file_exists($zipname)) {
        header('Content-Description: File Transfer');
        header('Content-Type: application/zip');
        header('Content-Disposition: attachment; filename='.basename($zipname));
        header('Content-Transfer-Encoding: binary');
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
        header('Content-Length: ' . filesize($zipname));
        ob_clean();
        flush();
        readfile($zipname);
        exit;
    } else {
        exit("Could not find Zip file to download");
    }
    mysqli_free_result($result);
    mysqli_close($conn);
}

从MySQL

1 个答案: